This is a comparison of two unlike things using the terms "like" or "as".
Simile.
This is a direct comparison of two things, in which they are said to be (in some sense) the same thing.
Metaphor.
This is the reference to a person, place, or event from history, literature, or religion with which a reader is likely to be familiar.
Allusion
This is extreme exaggeration used in a literary work.
Hyperbole
This goes beyond the literal meanings of words to create special effects or feelings.
Figurative language
This is a phrase in common use that can not be understood by literal or ordinary meanings.
Idiom
This is something which seemingly cannot be, yet it is; a contradiction.
Oxymoron
Answer: B. Language.
Explanation: similes, metaphors and allusions are figures of speech, similes and metaphors are comparison between elements that aren't obviously related (similes use the words "like" and "as" to make a comparison and metaphors don't, this last ones are direct comparisons), and allusions are brief references to persons, places or events (historical, political, cultural, etc). The use of these literary device is an example of language choices, so the correct answer is option B.
If there were adults on the island then the adults would be telling them what to do and they wouldn't make their own decisions.
This is punctuated correctly.
"Marshmallows are my favorite snack" is a complete sentence unto itself.
The comma instead of a period shows that the sentence spoken is part of the whole sentence, which includes the speaker (she) and a word to describe how the speaker said it (explained).
Since this is during the period of the Soviet Union and communism, Kennedy is asking the people to come together and defend freedom.